Outdoor Unit Solenoid Valve; Protection Function - Fujitsu Airstage V-II Service Manual

SERVICE PARTS INFORMATION 17

Outdoor Unit Solenoid Valve

(SV1,SV2,SV3,SV5,SV6)
Check Point 1 : Check connections
Check connection of connector.
(Loose connector or open cable)
AJ*A72,90LALH
>> C106,C107,C108
AJ*A108LALH
>> C106,C107,C108,CN111
AJ*A126,144LALH
>> C106,C107,C108,CN110
Check Point 4 : Check opening & closing operation of Valve
Depending on either during operation or protection control, check if Valve is operating normally.
(When Valve opens, there is no temperature difference between Inlet and Outlet.)
Normal Operation
Pipe (In) TEMP. Hi,
Pipe (Out) TEMP.Normal
Pipe (In)
Hi TEMP.
If the valve closes by removing the connector of the valve
which does not close, it is considered to be Controller PCB
failure. Replace Controller PCB.
If it does not close by removing connector, there is a
possibility of (1) clogging by dirt, or (2) deformation by
the heat at the time of Solenoid Valve installation.
In this case, replace Solenoid Valve.
1
2
BLUE
1 1
SV6
BLUE
3 2
BLUE
1
1
SV5
BLUE
3
2
1
2
BLUE
1 1
SV3
BLUE
3 2
BLUE
1 1
SV2
BLUE
3 2
BLUE
1 1
SV1
BLUE
3 2
CLOSE
Pipe (Out)
Normal TEMP.
SOLENOIDE COIL
AC
(1)
04-113
Check Point 2 : Check Solenoid Coil
Remove connector and check if coil is open.
(Normal resistance value of each coil: 1495 ± 7%
>> If Resistance value is abnormal, replace Solenoid Coil.
Check Point 3 : Check Voltage from Controller PCB
Remove connector and check the voltage (AC220V).
>> If the voltage does not appear, replace Controller PCB.

Protection Function

Pipe (In) TEMP. = Pipe (Out) TEMP.
Pipe (In)
Hi TEMP.
SOLENOIDE COIL
)
OPEN
Pipe (Out)
Hi TEMP.
AC
(2)
AC